A basketball player makes a 3-point shot from 25 ft from the hoop. The ball is in the air for 1 s, and the player imparts the typical 2 rev/s backspin to the ball. Ignore drag. (a) (b) (c) Approximately what is the horizontal component of the ball's velocity at the peak of its trajectory? What is the direction of the Magnus force on the way up? at the peak of the trajectory? on the way back down? At the peak of the ball's trajectory, approximately what is the magnitude of the Magnus force? Express your answer in ounces.

A truck with mass m=1000kg is traveling around a circular curve of radius r=835m when it starts to rain. The coefficient of static friction between the road and the tires is μdry=0.63 when dry, and it is μwet=0.15. The road is level, and the curve is unbanked.   (a) When conditions are dry, what is the maximum tangential speed, in meters per second, at which the truck can take the corner at without slipping?  61.74 is wrong.  (b) When conditions are wet, what is the maximum tangential speed, in meters per second, without slipping?

A Formula-1 car encounters a hump which has a circular shape with smooth transitions at either end. (a) What speed vg will cause the car to lose contact with the road at the topmost point B? (b) For a speed VA = 166 km/h, what is the normal force exerted by the road on the 630-kg car as it passes point A? Answers: 14.1 p 260 m T (a) VB= i B (b) NA= i m/s N

I already got the answers for 1,2 and 3 (6.55m/s, -1.5166m/s, 5.042m/s respectively). can you please help me with letters d and e?